/* ============================================
   HOME LIBRARY CURATION - FUTURISTIC DESIGN
   Isometric Structuralism Theme
   ============================================ */

/* CSS Variables */
:root {
  /* Color Palette */
  --color-library-ink: #05070A;
  --color-laser-gold: #D4AF37;
  --color-ghost-parchment: #E8E8E8;
  --color-ultraviolet: #6A0DAD;
  --color-dark-bg: #0A0D12;
  --color-light-accent: rgba(212, 175, 55, 0.1);
  
  /* Typography */
  --font-serif: 'Zilla Slab', serif;
  --font-sans: 'Michroma', sans-serif;
  --font-fallback: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Borders & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(106, 13, 173, 0.4);
  --shadow-gold: 0 0 15px rgba(212, 175, 55, 0.3);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Layout */
  --max-width: 1400px;
  --header-height: 80px;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans), var(--font-fallback);
  background: var(--color-library-ink);
  color: var(--color-ghost-parchment);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif), serif;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--color-ghost-parchment);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: var(--space-md);
  font-size: clamp(0.9rem, 1.5vw, 1rem);
}

a {
  color: var(--color-laser-gold);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--color-ultraviolet);
  opacity: 0.9;
}

/* Header */
.site-header {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: rgba(10, 13, 18, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: var(--header-height);
}

.site-header nav {
  display: flex;
}

.site-header .brand-text {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: 600;
  color: var(--color-laser-gold);

}

.site-nav {
  display: flex;
  gap: 15px;
  align-items: center;
  list-style: none;
}

.site-nav a {
  font-size: 0.7rem;
  text-transform: uppercase;
  padding: var(--space-sm) var(--space-md);
  position: relative;
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-md);
  right: var(--space-md);
  height: 1px;
  background: var(--color-ultraviolet);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.site-nav a:hover::after {
  transform: scaleX(1);
}

/* Burger Menu - Visible only up to 1023px */
.burger-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-laser-gold);
  color: var(--color-laser-gold);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  font-size: 1.2rem;
  position: relative;
  z-index: 1001;
  transition: all var(--transition-base);
  min-width: 44px;
  min-height: 44px;
}

.burger-toggle:hover {
  background: var(--color-light-accent);
  border-color: var(--color-ultraviolet);
}

.burger-toggle .icon-bars {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-laser-gold);
  margin: 5px auto;
  transition: all var(--transition-base);
}

.burger-toggle.active .icon-bars:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.burger-toggle.active .icon-bars:nth-child(2) {
  opacity: 0;
}

.burger-toggle.active .icon-bars:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Nav - Separate from header, opens below */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  width: 100%;
  max-height: calc(100vh - var(--header-height));
  background: var(--color-dark-bg);
  border-bottom: 1px solid var(--color-laser-gold);
  padding: var(--space-lg);
  z-index: 999;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.mobile-nav.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.mobile-nav a {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-md);
  display: block;
  border-bottom: 1px solid rgba(212, 175, 55, 0.1);
}

/* Main Content */
main {
  position: relative;
  min-height: calc(100vh - var(--header-height) - 200px);
}

/* Full-Width Banner */
.hero-banner {
  position: relative;
  width: 100vw;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(5, 7, 10, 0.85) 0%, rgba(10, 13, 18, 0.75) 100%);
  z-index: 2;
}

.hero-banner-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  opacity: 0.4;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: var(--max-width);
  width: 100%;
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
}

.hero-content h1 {
  margin-bottom: var(--space-lg);
  color: var(--color-ghost-parchment);
  text-shadow: 0 0 30px rgba(106, 13, 173, 0.5);
}

.hero-content p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  max-width: 800px;
  margin: 0 auto var(--space-xl);
  color: var(--color-ghost-parchment);
}

/* Section Containers */
.content-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
  position: relative;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-2xl);
  position: relative;
  padding-bottom: var(--space-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-laser-gold), transparent);
}

/* Isometric Grid Layout - Centered with proper sizing */
.isometric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-2xl) auto 0;
  max-width: var(--max-width);
  perspective: 1000px;
  justify-items: center;
}

.isometric-card {
  position: relative;
  background: rgba(10, 13, 18, 0.8);
  border: 1px solid rgba(212, 175, 55, 0.2);
  padding: var(--space-xl);
  transform-style: preserve-3d;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.isometric-card:hover {
  transform: translateY(-8px) rotateX(2deg);
  box-shadow: var(--shadow-glow);
  border-color: var(--color-ultraviolet);
}

.isometric-card-image {
  width: 100%;
  max-width: 100%;
  height: 200px;
  object-fit: cover;
  margin-bottom: var(--space-md);
  border: 1px solid rgba(212, 175, 55, 0.1);
}

.isometric-card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--color-laser-gold);
}

/* Wireframe Overlay Effect */
.wireframe-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  border: 2px solid var(--color-ultraviolet);
  background: linear-gradient(45deg, transparent 48%, rgba(106, 13, 173, 0.2) 50%, transparent 52%),
              linear-gradient(-45deg, transparent 48%, rgba(106, 13, 173, 0.2) 50%, transparent 52%);
  background-size: 20px 20px;
}

.isometric-card:hover .wireframe-overlay {
  opacity: 1;
}

/* Spine Scanner HUD */
.spine-scanner-hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(5, 7, 10, 0.95);
  border: 1px solid var(--color-ultraviolet);
  padding: var(--space-md);
  opacity: 0;
  transform: translateY(-100%);
  transition: all var(--transition-base);
  z-index: 10;
  font-family: var(--font-sans);
  font-size: 0.85rem;
}

.spine-scanner-hud.active {
  opacity: 1;
  transform: translateY(0);
}

.hud-data {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.hud-item {
  padding: var(--space-sm);
  border-left: 2px solid var(--color-laser-gold);
}

.hud-label {
  color: var(--color-laser-gold);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hud-value {
  color: var(--color-ghost-parchment);
  font-weight: 600;
}

/* Buttons */
.btn-primary {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  background: transparent;
  border: 2px solid var(--color-laser-gold);
  color: var(--color-laser-gold);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  margin-top: 10px;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--color-laser-gold);
  transition: left var(--transition-base);
  z-index: -1;
}

.btn-primary:hover {
  color: var(--color-library-ink);
  box-shadow: var(--shadow-gold);
}

.btn-primary:hover::before {
  left: 0;
}

/* Contact Form */
.contact-container {
  max-width: 800px;
  margin: 0 auto;
}

.contact-form {
  background: rgba(10, 13, 18, 0.8);
  border: 1px solid rgba(212, 175, 55, 0.2);
  padding: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--color-laser-gold);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  background: rgba(5, 7, 10, 0.8);
  border: 1px solid rgba(212, 175, 55, 0.3);
  color: var(--color-ghost-parchment);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-ultraviolet);
  box-shadow: 0 0 10px rgba(106, 13, 173, 0.3);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.checkbox-group input[type="checkbox"] {
  width: auto;
  margin-top: 4px;
}

.checkbox-group label {
  margin-bottom: 0;
  font-size: 0.85rem;
  text-transform: none;
  letter-spacing: normal;
}

/* Google Maps */
.map-container {
  width: 100%;
  height: 400px;
  border: 1px solid rgba(212, 175, 55, 0.3);
  margin-bottom: var(--space-2xl);
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: none;
  filter: grayscale(50%) brightness(0.8);
}

/* Products Grid - Centered */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-2xl) auto 0;
  max-width: var(--max-width);
  justify-items: center;
}

.product-card {
  background: rgba(10, 13, 18, 0.8);
  border: 1px solid rgba(212, 175, 55, 0.2);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.product-card:hover {
  border-color: var(--color-ultraviolet);
  box-shadow: var(--shadow-glow);
}

.product-image {
  width: 100%;
  max-width: 100%;
  height: 180px;
  object-fit: cover;
  margin-bottom: var(--space-md);
}

.product-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--color-laser-gold);
}

.product-price {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-ultraviolet);
  font-weight: 600;
  margin-top: var(--space-md);
}

/* Footer */
.site-footer {
  background: var(--color-dark-bg);
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  padding: var(--space-2xl) var(--space-lg);
  margin-top: var(--space-3xl);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
}

.footer-section h3 {
  font-size: 1rem;
  margin-bottom: var(--space-md);
  color: var(--color-laser-gold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-nav {
  list-style: none;
}

.footer-nav li {
  margin-bottom: var(--space-sm);
}

.footer-nav a {
  font-size: 0.9rem;
  color: var(--color-ghost-parchment);
  opacity: 0.8;
}

.footer-nav a:hover {
  opacity: 1;
  color: var(--color-laser-gold);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-xl);
  margin-top: var(--space-xl);
  border-top: 1px solid rgba(212, 175, 55, 0.1);
  font-size: 0.85rem;
  opacity: 0.7;
}

/* Thank You Page */
.thank-you-container {
  max-width: 700px;
  margin: var(--space-3xl) auto;
  padding: var(--space-2xl);
  text-align: center;
  background: rgba(10, 13, 18, 0.8);
  border: 1px solid rgba(212, 175, 55, 0.3);
}

.thank-you-icon {
  font-size: 4rem;
  color: var(--color-laser-gold);
  margin-bottom: var(--space-lg);
}

/* 404 Page */
.error-404 {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.error-code {
  font-size: 8rem;
  font-family: var(--font-serif);
  color: var(--color-laser-gold);
  line-height: 1;
  margin-bottom: var(--space-lg);
  text-shadow: var(--shadow-glow);
}

/* Privacy Popup */
.privacy-popup {
  position: fixed;
  bottom: var(--space-lg);
  left: var(--space-lg);
  right: var(--space-lg);
  max-width: 600px;
  background: rgba(10, 13, 18, 0.98);
  border: 2px solid var(--color-laser-gold);
  padding: var(--space-xl);
  z-index: 2000;
  box-shadow: var(--shadow-lg);
  display: none;
}

.privacy-popup.active {
  display: block;
}

.privacy-popup p {
  margin-bottom: var(--space-md);
  font-size: 0.9rem;
}

.privacy-popup-buttons {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

/* Color Slider Styles */
#color-slider {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, #000 0%, #fff 100%);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

#color-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-laser-gold);
  cursor: pointer;
  border: 2px solid var(--color-library-ink);
  box-shadow: var(--shadow-gold);
}

#color-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-laser-gold);
  cursor: pointer;
  border: 2px solid var(--color-library-ink);
  box-shadow: var(--shadow-gold);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

/* Gravity Scroll Effect */
.gravity-scroll {
  transition: transform var(--transition-slow);
}

/* Responsive Design */
@media (max-width: 1023px) {
  .site-nav {
    display: none;
  }
  
  .burger-toggle {
    display: block;
  }
  
  .mobile-nav {
    display: block;
  }
  
  .hero-content {
    padding: var(--space-xl) var(--space-md);
  }
  
  .content-section {
    padding: var(--space-2xl) var(--space-md);
  }
  
  .isometric-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
  }
  
  .products-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

/* Desktop - hide mobile nav and burger, show regular nav */
@media (min-width: 1024px) {
  .burger-toggle {
    display: none !important;
  }
  
  .mobile-nav {
    display: none !important;
  }
  
  .site-nav {
    display: flex;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }
  
  .site-header {
    padding: var(--space-md);
  }
  
  .hero-banner {
    min-height: 50vh;
  }
  
  .isometric-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-form {
    padding: var(--space-lg);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .privacy-popup {
    left: var(--space-md);
    right: var(--space-md);
    bottom: var(--space-md);
    padding: var(--space-lg);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .hero-banner {
    min-height: 40vh;
  }
  
  .content-section {
    padding: var(--space-xl) var(--space-md);
  }
  
  .error-code {
    font-size: 5rem;
  }
}

/* Animations */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 10px rgba(106, 13, 173, 0.4);
  }
  50% {
    box-shadow: 0 0 20px rgba(106, 13, 173, 0.8);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus Styles */
button:focus,
a:focus,
input:focus,
textarea:focus {
  outline: 2px solid var(--color-ultraviolet);
  outline-offset: 2px;
}